Exterior lamp mounting plate



FIG. 1 is a front view of the exterior lamp mounting plate incorporating my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a right side view thereof, the left side being a mirror image; and,

FIG. 5 is a rear view thereof. 

The ornamental design for a exterior lamp mounting plate, as shown and described. 